We are testing concepts and evaluating performance of Cs atomic vapor-cell clocks designed specifically for undersea applications (constrained by power consumption, low temperatures (-10 to +10 C), harsh environment) that require reliable atomic timing over durations of greater than one year. Initial results look very promising relative to alternatives.
Our work [Dailey et al., Nature Astronomy 5, 150 (2021)] extends the gravitational and electromag-netic modalities of multi-messenger astronomy to exotic (beyond the Standard Model of elementary particles) fields. We are interested in a direct detection of exotic fields emitted by the powerful astrophysical events such as binary black hole mergers. While the progenitors can be located in...
Compact robust atomic clocks are being developed as remote timing references with extended holdover to mitigate difficulties arising from loss of disciplining during periods when GNSS satellite constellations are unavailable. This paper describes progress on two NPL low SWaP trapped ion atomic clock systems, namely the ytterbium multi-ion 12.6 GHz microwave clock and the strontium single ion...
